CRITICAL  NOTES  ON  THE  SUBSPECIES  OF 
THE  SPOTTED  OWL,  STRIX  OCCI- 
DENTALIS  (XANTUS) 


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Of  the  Biological  Survey,  United  States  Department  of  Agriculture 


No.  2106. — From  the  Proceedings  of  the  United  States  National  Museum, 
Vol.  49,  pages  251-257 

Published  July  26,  1915 


Washington 

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CRITICAL  NOTES  ON  THE  SUBSPECIES  OF 
THE  SPOTTED  OWL,  STRIX  OCCI- 
DENTALIS  (XANTUS) 


BY 


HARRY  C.  OBERHOLSER 


Of  the  Biological  Surrey,  United  States  Department  of  Agriculture 


No.  2106. — From  the  Proceedings  of  the  United  States  National  Museum, 
Vol.  49,  pages  251-257 

Published  July  26,  1915 


Washington 

Government  Printing  Office 

1915 


CRITICAL  NOTES  ON  THE  SUBSPECIES  OF  THE  SPOTTED 
OWL,  STRIX  OCCIDENTALIS  (XANTUS). 


By  Harry  C.  Oberholser, 

Of  the  Biological  Survey , United  States  Department  of  Agriculture. 


The  four  current  subspecies  of  Strix  occidentalism  with  the  geo- 
graphical range  apportioned  to  each,  are  as  follows: 

STRIX  OCCIDENTALIS  OCCIDENTALIS  (Xantus). 

Symium  occidental  Xantus,  Proc.  Acad.  Nat.  Sci.  Phila.,  1859,  p.  193  (Fort 
Tejon,  California). 

Southern  California  and  northern  Lower  California. 

STRIX  OCCIDENTALIS  CAURINA  (Merriam). 

Symium  occidental  caurinum  Merriam,  Auk,  vol.  15,  January,  1898,  p.  40  (Mount 
Vernon,  Skagit  Valley,  Washington). 

Southern  British  Columbia,  south  through  western  Washington  and 
western  Oregon  to  central  California. 

STRIX  OCCIDENTALIS  HUACHUCAE  Swarth. 

Strix  occidentalis  huachucae  Swarth,  Univ.  Calif.  Publ.  Zool.,  vol.  7,  No.  1,  May 
26, 1910,  p.  3 (Huachuca  Mountains,  Arizona). 

Arizona,  New  Mexico,  Colorado,  and  central  western  Texas. 

STRIX  OCCIDENTALIS  LUCIDA  (Nelson). 

Symium  occidental  lucidum  Nelson,  Proc.  Biol.  Soc.  Wash.,  vol.  16,  November 
30,  1903,  p.  152  (Mount  Tancitaro,  Michoacan,  Mexico). 

States  of  Guanajuato  and  Michoacan,  Mexico. 

Each  of  these  forms  was  originally  described  from  a single  specimen, 
and  the  species  is  still  uncommon  in  museums.  Recent  collecting  for 
the  United  States  Biological  Survey  has  resulted  in  the  acquisition  of 
eight  adult  specimens  of  Strix  occidentalis  huachucae , all  in  fine  adult 
autumn  plumage,  six  of  them  from  New  Mexico,  the  others  from 
Arizona.  The  types  of  Strix  occidentalis  caurina  and  Strix  occidentalis 
lucida  are  also  in  the  Biological  Survey  collection;  while  in  addition 
the  United  States  National  Museum  possesses  the  type  of  Strix  occi- 
dentalis occidentalis  and  another  California  specimen;  one  adult  Strix 
occidentalis  lucida  from  Guanajuato,  Mexico;  and  a practically  topo- 
typical  example  of  Strix  occidentalis  huachucae.  Through  the  kindness 

Proceedings  U.  S.  National  Museum,  Vol.  49— No.  2106. 

251 


50157 


252 


PROCEEDINGS  OF  THE  NATIONAL  MUSEUM. 


vol.  49. 


of  Dr.  Joseph  Grinnell  I have  been  able  to  examine  the  type  of  Strix 
occidentalis  huachucae ; and  Dr.  Louis  B.  Bishop  has  obligingly  sent 
two  specimens  from  New  Mexico,  together  with  three  from  Arizona, 
and  two  of  Strix  occidentalis  occidentalis  from  California.  Through 
Mr.  H.  S.  Swarth  it  has  been  made  possible  to  borrow  nine  more 
specimens  of  Strix  occidentalis  occidentalis  from  California,  which  he 
had  brought  together  for  a further  study  of  his  Strix  occidentalis 
huachucae.  He,  furthermore,  very  courteously  offered  the  writer  the 
use  of  his  manuscript  notes  made  with  the  view  of  publishing  a sup- 
plementary account.  The  above  material,  altogether  31  specimens, 
including  2 in  juvenal  plumage,  constitutes  by  considerable  the 
largest  series  of  birds  of  this  species  that  has  ever  been  available  at 
one  time.  A careful  study  of  these  for  the  purpose  of  identifying 
specimens  in  the  collection  of  the  Biological  Survey,  compels  some 
surprising  as  well  as  interesting  conclusions,  which  seem  worthy  of 
printed  record. 

The  eight  adult  examples  from  New  Mexico,  together  with  the  six 
from  southern  Arizona,  represent  what  should  be  typical  Strix  occi- 
dentalis huachucae.  This  race,  quoting  the  original  description,1 
differs  from  Strix  occidentalis  occidentalis  as  follows: 

“ Similar  to  Strix  occidentalis  occidentalis  (Xantus),  but  slightly 
smaller,  and  conspicuously  paler;  white  markings  more  extensive 
and  dark  areas  less  deep  toned.” 

An  exhaustive  comparison  of  this  series  of  14  adults  from  New 
Mexico  and  Arizona  with  typical  Strix  occidentalis  occidentalis  shows 
that  all  but  one  of  the  characters  given  to  separate  Strix  occidentalis 
huachucae  are  merely  individual.  The  difference  of  size  is  inconsider- 
able and  inconsequential,  as  the  appended  measurements  demonstrate; 
while  the  supposedly  most  important  distinction,  that  of  the  lighter 
tone  of  the  dark  areas,  appears  in  but  five  of  the  fourteen  specimens, 
and  many  of  the  others  are  even  darker  than  normal  Strix  occidentalis 
occidentalis ! A single  bird  from  Tucson,  Arizona  (No.  84433, U.S.N.M), 
is  the  palest  of  the  present  series,  being,  in  its  light  rufescent  brown 
coloration,  very  much  like  the  type  of  Strix  occidentalis  huachucae , but 
even  lighter  and  more  rufescent,  with  more  tinge  of  ochraceous  on  the 
face  and  lower  parts.  A specimen  from  the  Santa  Rita  Mountains  (No. 
241139,  U.S.N.M.),  some  30  or  40  miles  south  of  Tucson  is,  however,  as 
dark  as  the  type  of  Strix  occidentalis  caurina,  the  supposedly  darkest 
form  of  the  species.  Other  examples  from  N ew  Mexico  are  even  darker. 
Thus,  light  rufescent  birds  like  the  Tucson  specimen  above  mentioned, 
together  with  others  nearly  as  light  in  ground  color,  from  New  Mexico 
and  Arizona,  are  found  geographically  intermingled  with  dark  birds, 
and  must  be  considered,  therefore,  merely  as  representing  a color 
phase.  There  is,  likewise,  nothing  but  individual  variation  in  the 


1 Swarth,  Univ.  Calif.  Publ.  Zool.,  vol.  7,  No.  1,  May  26, 1910,  p.  3. 


NO.  2106. 


NOTES  ON  THE  SPOTTED  OWL—OBERHOLSER. 


253 


amount  of  dark  mottling  on  the  legs  and  feet  of  these  specimens,  so 
that  this  can  not  be  a racial  characteristic.  The  only  characters,  so 
far  as  we  can  discover,  which  will  distinguish  Strix  occidentdlis  hua- 
chucae from  Strix  occidentdlis  occidentdlis  are  the  larger  white  markings 
on  scapulars,  cervix,  superior  wing-coverts,  and  posterior  lower  parts; 
together  with  the  paler,  often  whitish  bars  on  wing-quills  and  tail- 
feathers.  This  increase  of  white  is  most  conspicuous  and  most  nearly 
constant  on  the  scapulars,  only  average  on  the  other  parts;  but 
taken  altogether,  seems  sufficient  for  the  recognition  of  the  Arizona 
race  as  distinguished  from  that  of  California. 

Another  subspecies  described  as  Syrnium  occidentale  luddum  from 
Mount  Tancitaro,  Michoacan,  Mexico,  by  Mr.  E.  W.  Nelson,1  was 
diagnosed  as  follows: 

“ Darker  and  with  much  less  yellowish  buffy  suffusion  throughout 
than  in  S.  occidentale ; white  markings  larger  and  clearer  white.” 

The  type  is  identical  in  all  respects  with  a specimen  from  Taylor 
Creek,  Socorro  County,  New  Mexico,  except  for  being  not  quite  so 
dark  above  as  the  latter.  As  a matter  of  fact,  most  of  the  birds  in 
the  New  Mexico  and  Arizona  series  are  fully  as  dark  as  the  type  of 
Strix  occidentdlis  lucida,  several  of  them  even  more  deeply  colored. 
Another  Mexican  example,  from  Guanajuato,  is  the  same  as  Strix 
occidentdlis  lucida  from  Michoacan,  though  somewhat  lighter  than 
the  type,  with  almost  immaculate  white  legs  and  feet  and  more 
restricted  white  markings  on  the  upper  surface.  From  others  of  the 
Arizona  and  New  Mexico  series  it  can  not  be  distinguished.  Since, 
furthermore,  all  the  characters  valid  for  the  separation  of  Strix  occi- 
dentdlis lucida  from  Strix  occidentdlis  occidentdlis  are  the  same  as 
those  distinguishing  Strix  occidentdlis  huachucae  from  Strix  occidentdlis 
occidentdlis,  it  follows  that  Strix  occidentdlis  lucida  and  Strix  occidentdlis 
huachucae  are  identical.  Thus  the  name  of  the  Arizona  race  becomes 
Strix  occidentdlis  lucida  Nelson,1  because  this  name  has  several  years 
priority  over  Strix  occidentdlis  huachucae  Swarth.2 

The  above  comparisons  necessarily  involved  an  examination  of 
Strix  occidentals  caurina,  from  Mount  Vernon,  Washington.  This  was 
originally  described  3 as  differing  from  Strix  occidentdlis  occidentals 
principally  by  reason  of  darker  general  coloration  and  reduced  white 
markings.  The  before-mentioned  specimens  from  California  prove 
beyond  reasonable  doubt  that  Strix  occidentdlis  caurina  is  a synonym 
of  Strix  occidentdlis  occidentals,  for  all  its  peculiarities  are  to  be  found 
among  these  California  birds.  Many  of  the  specimens  of  Strix  occi- 
dentdlis lucida  from  Arizona  and  New  Mexico  are  fully  as  dark  above 
as  is  Strix  occidentals  caurina,  and  some  are  even  darker;  several  are 
as  dark  below,  with  nearly  the  same  amount  of  ochraceous  suffusion 

1 Proc.  Biol.  Soc.  Wash.,  vol.  16,  November  30, 1903,  p.  152. 

2 Univ.  Calif.  Publ.  Zool.,  vol.  7,  No.  1,  May  26, 1910,  p.  3. 

3 Merriam,  Auk,  vol.  15, 1898,  p.  40. 


254 


PROCEEDINGS  OF  THE  NATIONAL  MUSEUM. 


VOL.  49. 


posteriorly,  and  with  practically  an  equal  amount  of  mottling  on  the 
legs  and  feet.  In  the  reduction  of  light  markings  on  the  upper  surface 
the  type  of  Strix  occidentalis  caurina  may  be  closely  matched  in  all 
respects  by  some  of  the  California  birds,  as  well  as  by  the  type  of 
Strix  occidentalis  occidentalis.  Moreover,  the  type  of  Strix  occidentalis 
occidentalis  is  an  old,  formerly  mounted  specimen,  and  is  considerably 
faded  and  apparently  otherwise  discolored.  Another  southern  Cali- 
fornia example  (No.  1392,  collection  of  G.  Willett)  is  actually  identical 
with  the  type  of  Strix  occidentalis  caurina , except  for  being  darker. 
There  is  thus  no  distinctive  character  left  for  the  recognition  of  Strix 
occidentalis  caurina  as  a subspecies. 

From  what  has  already  been  said  it  is  evident  that  there  are  but 
two  forms  of  Strix  occidentalis , instead  of  four,  although  both  have 
a relatively  wide  geographical  range.  The  only  characters  that  now 
appear  to  be  of  value  for  the  separation  of  these  geographical  races 
are  in  the  size  and  distinctness  of  the  white  markings  on  the  feathers, 
principally  of  the  upper  parts,  though  also  below,  but  there  is  great 
variation  even  in  this  respect  in  the  series  of  specimens  examined. 

The  following  millimeter  averages  of  birds  from  various  regions 
throughout  the  range  of  the  species,  show  clearly  of  how  little  sub- 
specific value  is  any  difference  of  size : 


Localities. 

Wing. 

Tail. 

Exposed 

culmen. 

Culmen 

from 

cere. 

Tarsus. 

Four  males  (Strix  occidentalis  occidentalis ),  from  Cali- 
fornia  

mm. 

309.8 

mm. 

202 

mm. 

30.9 

mm. 

20.9 

mm. 

52.5 

Seven  males  (Strix  occidentalis  lucida ),  from  Arizona 
and  New  Mexico 

307.1 

199.9 

29.8 

20.3 

53.1 

Six  females  (Strix  occidentalis  occidentalis),  from  Cali- 
fornia  

310.8 

206.1 

31.8 

22.2 

53.6 

One  female  (Strix  occidentalis  occidentalis),  from  Wash- 
ington   

304 

198 

31.5 

21.3 

54 

Six  females  (Strix  occidentalis  lucida),  from  Arizona 
and  N ew  Mexico 

312.7 

206.1 

31 

21.3 

53.4 

Two  females  (Strix  occidentalis  lucida ),  from  central 
Mexico 

311 

203 

30.6 

21.7 

54 

This  reduction  of  the  four  described  and  currently  recognized  sub- 
species of  Strix  occidentalis  to  two  closely  allied  forms  is  a surprising 
conclusion,  in  view  of  the  wide  geographical  range  of  the  species — 
from  central  Mexico  to  southern  British  Columbia — and  also  of  the 
well-known  tendency  of  owls  in  general,  to  form  numerous  geographi- 
cal races,  but  it  is  inevitable  from  an  examination  of  the  material 
now  available.  The  only  other  course  possible  is  to  reduce  them 
to  a single  form.  The  present  result  is,  however,  nearly  paralleled 
by  the  unexpected,  but  none  the  less  apparently  correct  conclusion 
by  Mr.  Robert  Ridgway  1 concerning  the  lack  of  any  recognizable 
subspecies  in  Otus  jlammeolus.  It  shows,  too,  that  geographic  or 
physiographic  analogy,  though  of  considerable  assistance  in  working 
out  geographical  races,  is  an  unsafe  guide  alone. 


1 Bull.  U.  S.  Nat.  Mus.,  No.  50,  pt.  vi,  April  8, 1914,  pp.  728-730. 


no.  2106.  NOTES  ON  THE  SPOTTED  OWL—OBERHOLSER.  255 

Our  investigation  has  resulted,  furthermore,  in  the  interesting  dis- 
covery that  there  are  two  well-marked  color  phases  in  Strix  occiden- 
talism the  lighter  of  which  is  of  comparatively  rare  occurrence.  One 
of  these  phases  is  characterized  above  by  a deep  clove  brown  ground 
color,  below  by  markings  of  similar  color,  and  is  represented  by  many 
of  the  specimens  in  the  Arizona-New  Mexico  series,  as  well  as  by  the 
types  of  Symium  occidentale  caurinum  Merriam  and  Symium  occi- 
dental lucidum  Nelson.  The  other  phase  is  rather  light  rufescent 
brown  above,  with  similar  markings  below,  and  is  exemplified  by  the 
specimen  from  Tucson  (No.  84433,  U.S.N.M.).  Between  these  two 
phases  there  are  various  intermediates,  represented  in  our  series  by 
the  types  of  Strix  occidental is  occidentalis  and  Strix  occidentals 
huachucae;  several  further  examples  from  Arizona  and  New  Mexico, 
and  a specimen  from  Pasadena,  California  (No.  135190,  U.S.N.M.). 

Another  point,  which  the  measurements  bring  out,  and  which  seems 
worthy  of  notice,  is  that  the  female  in  this  species  is  but  little  larger 
than  the  male,  showing  much  less  difference  in  this  respect  than  is 
usual  among  owls. 

In  view  of  the  above  conclusions,  the  races  of  this  species  will  now 
stand  as  follows: 

STRIX  OCCIDENTALIS  OCCIDENTALIS  (Xantus). 

Symium  occidentale  Xantus,  Proc.  Acad.  Nat.  Sci.  Phila.,  1859,  p.  193. 

Symium  occidentale  caurinum  Merriam,  Auk,  vol.  15,  January,  1898,  p.  40. 

Type-locality. — Fort  Tejon,  California. 

Geographical  distribution. — Pacific  coast  region  of  the  United 
States,  in  Washington,  Oregon,  and  California;  also  north  to  southern 
British  Columbia;  south  to  northern  Lower  California;  and  east  to 
eastern  California. 

Measurements .* l — Male:  Total  length  (in  flesh),  436.9  mm.;3 
extent  of  wing,  763.2 

Female:  Total  length  (in  flesh),  431.8-489  (average,  463.6)  mm.;1 
extent  of  wing,  104 1.4. 2 

Male:4  Wing,  301-322  (average,  309.8)  mm.;  tail,  200-204  (202); 
exposed  culmen,  29.3-32  (30.9);  culmen  from  cere,  20.5-21.2  (20.9); 
tarsus,  51-54.5  (52.5). 

Female: 5 Wing,  304-315  (average,  309.9)  mm.;  tail,  193-213 
(204.9);  exposed  culmen,  30-33  (31.7);  culmen  from  cere,  20-23.8 
(22);  tarsus,  53-54  (53.7). 


» Measurements  in  this  paper  are  in  millimeters,  and  have  been  taken  as  explained  in  the  writer’s  article 
on  Butorides  virescens  (Proc.  U.  S.  Nat.  Mus.,  vol.  42,  August  29, 1912,  p.  533),  except  for  “culmen  from  cere," 
which  is  the  chord  of  the  culmen  taken  from  the  tip  of  the  maxilla  to  the  anterior  edge  of  the  cere. 

* One  specimen. 

8 Three  specimens. 

1 Four  specimens,  from  California. 

® Seven  specimens,  from  California  and  Washington. 


256 


PROCEEDINGS  OF  THE  NATIONAL  MUSEUM. 


vol.  49. 


Detailed  measurements  of  the  specimens  of  this  race  examined  are 
as  follows: 


Measurements  of  specimens  of  Strix  occidentalis  occidentalis. 


Museum 
and  No. 

Sex. 

Locality. 

Date. 

Collector. 

CUD 

.9 

£ 

Tail. 

1 Exposed  cul- 

| men. 

1 Culmen  from 

cere. 

Tarsus. 

L.B. Bishop  26195 1 

Male 

Near  Monrovia  (alt., 

Nov.  3,1913 

G.  Willett. . . 

mm 

311 

mm 

204 

mm 

31 

mm 

21.2 

mm 

51.5 

G.  Willett  1392 1 . . 

. . .do 

2,500  ft.),  Los 

Angeles  Co.,  Cal. 
do 

Nov.  9,1913 

do 

305 

201 

32 

20.5 

53 

U.S.N.M.  17200U  . 

. ..do 

Fort  Tejon,  Cal.2 

J.  Xantus. . . 

322 

203 

31.3 

21 

51 

U.S.N.M.  135190  i . 

...do 

Pasadena,  Cal 

Nov.  1,1894 

W.  B.  Jud- 

301 

200 

29.3 

21 

54.5 

G.  Willett  830i... 

Female  . 

Fillmore,  Ventura 

Dec.  13,1910 

son. 

A.  N.  Stone. 

305 

193 

31.3 

22 

54 

L.B  .Bishop  261961 

...do 

Co.,  Cal. 

do 

do 

do 

315 

203 

32.8 

22.5 

53 

C.  H.  Richardson 

...do 

Wilson  Peak  Trail, 

Mar.  21,1905 

C.  H.  Rich- 

309 

211.5 

33 

20 

54 

jr.  495.1 

G.  Willett  13931.. 

...do 

Los  Angeles  Co., 
Cal. 

Near  Monrovia  (alt., 

Nov.  3,1913 

ardson,  jr. 

G.  Willett... 

315 

208 

31.8 

23.8 

53 

L.H.  Miller L. 

F.  S.  Daggett  45261 

...do 

...do 

2,500  ft.),  Los  An- 
geles Co.,  Cal. 
Castac  Creek,  Los 
Angeles  Co.,  Cal. 
San  Dimas  Canyon, 

Apr.  10,1911 

Feb.  14,1903 

L.  H.  Miller. 

F.  S.  Dag- 

310 

311 

213 

208 

30 

22.5 

54 

U.S.N.M.157473  i. . 

...do 

Pomona,  Cal. 
Mount  Vernon, 

June  22,1897 

gett. 

E.  A.  Preble. 

304 

198 

31.5 

21.3 

54 

L.  H.  Miller .. 

Mus.  Hist.  Sci. 

Female, 

juvenal. 

Wash. 3 

Forest  Home,  Cal 

Hills  west  of  New- 

Aug.  17,1913 

May  20,1906 

L.  H.  MUler. 

H.  J.  Le- 

310 

203 

31.3 

20.5 

53 

Art . 

G.  Willett  1395.  .. 

hall,  Los  Angeles 
Co.,  Cal. 

Near  Monrovia  (alt., 
2,500  ft.),  Los  An- 
geles Co.,  Cal. 

Nov.  3,1913 

lande. 

G.  Willett... 

314 

211 

31 

23 

51.5 

1 Used  in  measurement  averages  on  p.  255. 

2 Type  of  Syrnium  occidental e Xantus. 

* Type  of  Syrnium  occidentale  caurinum  Merriam. 


STRIX  OCCIDENTALIS  LUCIDA  Nelson. 

Syrnium  occidentale  lucidum  Nelson,  Proc.  Biol.  Soc.  Wash.,  vol.  16,  November 
30, 1903,  p.  152. 

Strix  occidentalis  huachucx  Swarth,  Univ.  Calif.  Publ.  Zool.,  vol.  7,  No.  1,  May 
26,  1910,  p.  3. 

Type-locality. — Mount  Tancitaro,  Michoacan,  Mexico. 

Geographical  distribution. — Southwestern  United  States  and  north- 
ern and  central  Mexico ; north  to  Colorado;  west  to  Arizona;  south 
to  Michoacan  and  Guanajuato;  and  east  to  western  Texas,  eastern 
New  Mexico,  and  central  Colorado. 

Chars,  subsp. — Similar  to  Strix  occidentalis  occidentalis,  but  white 
markings  on  scapulars,  upper  wing-coverts,  cervix,  and  posterior 
lower  parts  larger;  light  bars  on  remiges  and  rectrices  more  whitish. 

Measurements. — Male:  Total  length  (in  flesh),  419.1-444.5  (average, 
434.3)  mm.;4  extent  of  wing,  1054.1-1073.2  (1065.3).5 

Female: Total  length  (in  flesh),  419.1-457.2  (average,  441.5)  mm;5 
extent  of  wing,  1041.4-1098.3  (1073. 2). 5 


* Five  specimens. 
6 Four  specimens. 


NO.  2106. 


NOTES  ON  THE  SPOTTED  OWL—OBERHOLSER. 


257 


Male:1  Wing,  302-309  (average,  307.1)  mm.;  tail,  191-206  (199.9); 
exposed  culmen,  27-32  (29.8);  culmen  from  cere,  18.6-21.5  (20.3); 
tarsus,  52-54  (53.1). 

Female:2  Wing,  302-320  (average,  312.3)  mm.;  tail,  196-212.5 
(205.3);  exposed  culmen,  29-33  (30.9);  culmen  from  cere,  19.5-23 
(21.4);  tarsus,  51.5-55.5  (53.6). 

Detailed  measurements  are  added  in  the  following  table: 

Measurements  of  specimens  of  Strix  occidentalis  lucida. 


Museum 
and  No. 

Sex. 

Locality. 

Date. 

Collector. 

| Wing. 

Tail. 

1 Exposed  cul- 

men. 

1 Culmen  from 

cere. 

Tarsus. 

H.S.  Swarth  3691  3. 

Male.... 

HuachucaMts.,Ariz.  * 

Apr. 

11,1903 

H.S.  Swarth 

mm. 

308 

mm. 

193 

mm. 

29.5 

mm. 

20 

mm 

53 

U.S.N.M. 241139  A. 

...do 

Stone  Cabin  Canyon 

Oct. 

28, 1913 

V.  Bailey. . . 

309 

205 

29 

20 

53 

L.B.  Bishop  16876  s 

...do 

(alt.,  7,000  ft.), 
Santa  Rita  Mts., 
Ariz. 

Santa  Catalina  Mts., 

July 

7,1906 

H.  Kimball. 

302 

191 

32 

21.5 

53.5 

L.B.  Bishop  26164  3 

...do 

Ariz. 

Kelly  Canyon  (alt.. 

Mar. 

23,1914 

J.  S.  Ligon.. 

307 

201 

27 

20.5 

53.5 

U.S.N.M.  241186  3. 

...do 

6,500  ft.),  western 
side  of  San  Mateo 
Mts.,  Socorro  Co., 
N.  Mex. 

Head  of  Chloride 

Dec. 

20,1913 

do 

309 

201 

30 

18.6 

53 

U.S.N.M. 241183  8. 

...do.... 

Creek  (alt.,  8,000 
ft.),  12  miles  west 
of  Chloride,  Sierra 
Co.,  N.  Mex. 

6 miles  west  of  Chlo- 

Oct. 

22,1913 

do 

309 

206 

31 

21 

54 

U.S.N.M.  240762  3. 

...do 

ride  (alt.,  6, 500  ft.). 
Sierra  Co.,  N.  Mex. 
15  miles  northeast  of 

Oct. 

1,1913 

do 

306 

202 

30 

20.5 

52 

L.  B.  Bishop  16878 

U.S.N.M.  241184  3. 

Male,ju- 
venal. 
Female . 

Monticello  (alt., 
7,000  ft.),  San 

Mateo  Mts.,  So- 
corro Co.,  N.  Mex. 
Santa  Catalina  Mts., 
Ariz. 

3 miles  north  of  Eagle 

July 

Dec. 

7,1906 

5,1913 

H.  Kimball. 

J.  S.  Ligon.. 

315 

206 

31.3 

20.5 

54.5 

U.S.N.M.  2411851  . 

...do 

Peak  (alt.,  8,000 
ft.),  Tularosa 
Range,  Socorro 
Co.,  N.  Mex. 

Head  of  Chloride 

Dec. 

20, 1913 

do 

309 

208 

30.8 

21.8 

52.5 

U.S.N.M.  241138  a. 

...do 

Creek  (alt.,  8,000 
ft.),  12  miles  west 
of  Chloride,  Sierra 
Co.,  N.  Mex. 

Taylor  Creek  (alt., 

Nov. 

3,1913 

do 

308 

205 

29 

21.8 

51.5 

L.B.  Bishop  26165 8 

. ..do 

7,000  ft.),  30  miles 
west  of  Chloride, 
Socorro  Co.,  N. 
Mex. 

Bear  Canyon  (alt., 

Mar. 

7,1914 

do 

320 

212.5 

32 

21 

53.5 

U.S.N.  M.  84433  3.. 

...do 

7,000  ft.),  12  miles 
northwest  of  Fair- 
view,  Sierra  Co., 
N.  Mex. 

Tucson,  Ariz 

Nov. 

7,1872 

C.  E.  Ben- 

304 

205 

30 

19.5 

53 

L.B.  Bishop  16877  s 

...do 

Santa  Catalina  Mts., 

July 

7,1906 

dire. 

H.  Kimball. 

320 

200 

33 

23 

55.5 

U.S.N.M.  1852693. 

...do 

Ariz. 

Mount  Tancitaro, 

Feb. 

27, 1903 

E.  W.  Nel- 

320 

210 

31 

22.5 

55 

U.S.N.M.  81925  8.. 

...do 

Michoacan,  Mex.& 

Guanajuato,  Guana- 

son and 
E.A. Gold- 
man. 

A.  Dugfe 

302 

196 

30.2 

20.8 

53 

U.S.N.M.  241187... 

juato,  Mex. 

Blue,  Ariz 

May 

—,1914 

B.V.  Lilly.. 

321 

212 

31.5 

22 

54.5 

1 Seven  specimens,  from  Arizona  and  New  Mexico. 

2 Eight  specimens,  from  Arizona,  New  Mexico,  Michoacan,  and  Guanajuato. 
8 Used  in  measurement  averages  on  p.  257. 

4 Type  of  Strix  occidentalis  huachucae  Swarth. 
s Type  of  Syrnium  Occident  ale  lucidum  Nelson. 

81022°— Proc.  N.  M.  vol.  49—15 17 


